<template>
  <div>
    <!-- 面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card>
      <!--提醒区域-->
      <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon :closable="false">
      </el-alert>
      <!--步骤条区域-->
      <el-steps :space="200" :active="activeIndex -0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!--Tab栏区域-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">

        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                  v-model="addForm.goods_cat"
                  :options="catelist"
                  :props="cateProps"
                  expand-trigger="hover"
                  @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--渲染表单的item项-->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key=item.attr_id>
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb ,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>

            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--action 表示图片要上传到的后台api地址-->
            <el-upload
                :action="uploadURL"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--富文本编辑器组件-->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!--添加商品的按钮-->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>

      </el-form>

    </el-card>
    <!--图片预览-->
    <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  name: "Add",
  data() {
    return {
      activeIndex: '0',
      //添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        //
        attrs: []

      },
      addFormRules: {
        goods_name: [{required: true, message: '请输入商品名称', trigger: 'blur'}],
        goods_price: [{required: true, message: '请输入商品价格', trigger: 'blur'}],
        goods_weight: [{required: true, message: '请输入商品重量', trigger: 'blur'}],
        goods_number: [{required: true, message: '请输入商品数量', trigger: 'blur'}],
        goods_cat: [{required: true, message: '请选择商品分类', trigger: 'blur'}]
      },
      //商品分类列表
      catelist: [],
      //
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      //动态参数的列表数据
      manyTableData: [],
      //静态属性列表的数据
      onlyTableDate: [],
      // 上传图片的url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求头对象
      headerObj: {
        Authorization:
            window.sessionStorage.getItem('token')
      },
      //
      previewPath: '',
      //控制隐藏对话框
      previewVisible: false

    }

  },
  created() {
    this.getCateList()

  },
  methods: {
    async getCateList() {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败!')
      }
      this.catelist = res.data
      console.log(this.catelist)

    },
    //级联选择器选中项变化,会触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是' + oldActiveName)
      // console.log('即将进入的标签页名字是' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex)
      //证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'many'}})
        if (res.meta.status !== 200) {
          this.$message.error('获取动态参数列表失败')
        }
        console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data

      } else if (this.activeIndex === '2') {
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'only'}})
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        console.log(res.data)
        this.onlyTableDate = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true

    },
    //处理移除图片的操作
    handleRemove(file) {
      //console.log(file)
      //1.获取将要删除的临时路径
      const filePath = file.response.data.tep_path
      //2.从pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      //3.调用数组的 splice方法，吧图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)

    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      //1.拼接得到一个图片信息对象
      const picInfo = {pic: 'response.data.tmp_path '}
      //2.将图片信息对象，pushd到 pics 数组对象中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add() {
      //console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项!')
        }
        //执行添加的业务逻辑
        //lodash   cloneDeep(obj) 深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')

        //处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableDate.forEach(item => {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        //发起请求 添加商品
        //商品的名称，必须是唯一的
        const {data: res} = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')

        this.$router.push('/goods')


      })

    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewImg {
  width: 100%;
}

.btnAdd {
  margin-top: 15px;
}

</style>